Locomotive boiler



2 Sheets-Sheet 2 INVENT R ATTORNEY ,.J. .J. GAIN LocoMoTIvE BOILER Filed sept. z5 1920 Julyl, -1923.

A (G) v Patented July 3l, 1923.

i c messes siteralf JOHN J. GAIN, or Bayonne, NEWJERSEY.'

LOCOlVIOTIVE BOILER."

Application. filed September 25, 1,920. Serial'lo. 412,806.

To LZZ whom t 'may concern Be it known that I, JOHN J. GAIN, a citi-V zen of the United States, and aresident of Bayonne, county of Hudson, State of New Jersey, have invented new and useful linheating capacity, capable of withstanding desired maximum operating pressures and at a minimum cost to manufacture and` of upV keep expenses. To this end the size of sections, determined bythe largest dimensions, is such as -to occupy substantially-the whole of the area bounded by the vertical and transverse horizontal, dimensions of the'.

available space of the locomotive above its ruiming gear. The length of a boiler of thisinvention is much less than' that of a locomotive boiler of the usual type having the same steaming capacity, thus leaving con-- siderable unoccupied space at the front end of the locomotive.y This space, or part of it, may be occupied by additional sections applied to the front endI of the boiler when it is desired to increase the power lor steaming'.-

capacity of the boiler, the Vnumber of Vsaid added sections being commensurate with the desired increase of boiler power. The spacei at the front of the boiler maybe utilized to hold the accessories of the boiler, as for instance the air pumps, sandboxes, tools, &c. To fully describe the invention reference will now be had to the accompanying drawings, in which: f A

F iff. l, is a'longitudinal view of the boiler.

applied to a standard type vof locomotive, the running gear ofk which is represented by dotted lines.

Fig. 2, is a transverse section of the same throughV the furnace of the locomotive.

Fig. 3, shows the lower parts of a few of the sections of the boiler and means for con` nccting them to a longitudinal boiler supporting frame.

' Fig. 4, is an end view of girder of the rig. e. y

Fig. 5 isa transverse section, online 5, Fig. illustrating a method of. using some of the boiler sections for superheating the steam.

nances, and

Fig. 7 is a side view of the superheater sections shown in Fig.` 5, and oneofthe furnace sections of the boiler and ajbafile -plate or wall. l

y A co Y Fig. 6, isa plan view of said superlieater sections and their connections and appurte#` Inv applying a boiler. of this invention to a locomotive a suitable frameis provided, consisting of strong rigid longitudinal'side girders adequatelybraced together and se- I cured'to the framer of the running gear 8 of thel locomotive. These girders are Vvertically offset, the lower parts 9 being at the sides of the furnaceV and the higher l0 extend forwardlyk practically t'he full length .of the locomotive'ythey are pre-ferably composed of 'beams l1, and channel irons l2, rigidlyy secured to the tops of the l beams, see the enlarged views, particularly Figs. 3 and 4.

The sections of the boiler are substantially all alike and. are narrow hollow chambers with their largest `dimensions )transversely arranged in the boiler, their sidel areas be ing suchv as to occupyall' of the space bounded bythe available verticaland hori?v Azontal transverse measurements of the loco# motive above itsr running gear. See Figs. l-andQ. 'c

partsY Ato The sections are spaced apart toaiford passages betweenthem for the hot gases vfrom the furnace; they are preferably-herr.

Zontally corrugated vto strengthen them, to compensate for yvariations ofV temperatures and, by the siiiuosity of the passages to in-V crease heating effects. l

The transverse sections are. for manufacturing reasons, preferably `in two parts, ar-V ranged in'pairs, right and left in the boiler equal to and covering the transverse area determined by the height and transverse horizontal measurements of the available space of the locomotive above its :running .freu-vr.

y with their-'dinner central edges adjacent; the Lsurface of each pair being substantially The sections 13 yat the furnace "end of the boiler are formed with water Vlegs 14, by which they are supported (inthe portions 9 of the girders and they are here widened so as to be close together to constitute the side walls of the fire boX, or portions thereof",-

From the Water legs the edges of these sections .extend vupwardly in arch form towards the center ot the boiler, forming the crown oi' the fire box. The forward or other series of sections 15, rest at their lower edges on the portions 10 ol the girders and their under edges, which are arch shaped similar to the series 13, are suiiiciently high aboye the bottom of the boiler to provide a suitable coinbustion chamber 16. rllhis space 16 may be used as a continuous combustion chamber affording communication to all of the vertical passages between the sections 15 tor the yhot gases from the furnace that do not pass upwardly through the passages ot the sections 13; but when the boilers are inade of considerable length it is proposed to divide said chamber into compartments by an enclosing bafiie or `Wall 541, filling the space between the bottom of chamber and the underside of the sections a suitable distance from the lire box.

rThe adjacent sections ot each set i3 and 15 are coupled `together by expanded nioples 17 and `18 respectively at their lo "parts, affording Jfree Water communication between theni.

lilith Vthe Wall 54- located as above described all of the gaseous products of corri- /bustion Will iirst flow upwardly between the sections at the rear ot said Welt then along the communicating passage 55, at the top of the boiler, and down the passages of the sections into the portion of the chaml: er 1G immediately in front ot the Wall bein n so directed by a battle plate or Wall 5G, located in the passage '55. From the tor Ward division of the chamber 16 the gases ascend through `the passages of the toremost sections into the front end ot the vtop passages 55 and hence through the chimney 51. The boiler is thus divided into three passes, restricting the flow ot the gases by increasing the line of travel and insuring a moreperfect distribution of the heating effects ot' the hot `eases than it said battles 54 and 56 be omitted. Ot' course the number ot these bailies and their locations Vwill be determined by the size ot and particular requirements of the boiler to Which. they are applied. 56, torni extensions ot the bottoms and tops respectively ofthe sections to which they are applied, the sides ot said sections being in .no `Way interfered with as heating surfaces. The said sections vmay be increased in yertical dimensions to control the flow ot the gases through the combustion chamber 16, and smoke `passage 55. as described.

The upperparts oi the sections above the water level, really constituting a steam domel `for each section, should 'for practical open ative purposes be connected to an equalizin., chamber. For this purpose it l to.v use a Vdrum 19, etendino)` the itull su ita blyl The baiile Walls 54 and Y.

'it is proposed hoiveif'er to utilise sonic ot' the ot the boiler and located in a cylindrical space formed by circular recesses 20, made in the upper edges ot the two sets ot sections. rlhis drum is securely fastened to all of the sections and thereby holds them firmly in place, by nipples expanded iii opposed holes; the lower nipples Q1 connect the Water spaces of the drum and sections, the central nipples 22, located at the Water line ot the boiler, connect both the Water spaces 7 and the steam spaces and the `upper nipples 23 connect the steam spaces ot the drum and sections.

iVater vvill preferably be supplied to the boiler by a perforated pipe 24.- placed in the lower part of the drum 19. Fresh water will thus enter the sections 'from the drum by thevnipples Q1, and iiow down the interiors of the sections tor-rards the parts exposed to the greatest heat, insuring perfect circulation throughout the sections.

r'he upper parts of the adjacent sections may be connected togetlier'by expanded nipples it desirable.

Yn many or most cases modern engineerine; practice calls for superheated steam and the special features and ensemble ot tiis boiler adapts it to vproduce superhcated steam at little trouble and expense. Une, and the preferred method ot accomplishing;I this is to use some et the sections, Without a Y material changes, that are located iii i suitableVpart of the boiler. Any requisite or desired numberosections may be so used; see Figs. .6 and rlhe boiler, a whole. is supported or. l to the side girders and securely fastened l0; a suitable method 'for accomplis this being' by bolts which are thro: gli holes in the channel irons in dautres 2G formed on the lower e the. sections. flhesc tlc-.n es extend i'i Viront and rear sides et he sections.y where they are spaced apart, to abut, thus a. ing'rioidity to the structure.

s s'ignates tie furnace. the girate bara-29 one of the furnace doors` 3G the tlie CabotL the locomotive 3 troni the drum 19 yby alloiviiigzit to pass to the kngine tl'iroui'h the dry pipe 32,' bi

ei'ally a superheater will be used. Thi. consistot pipes extending; the tull l oi2 the boiler and a per part ot' the d to the dr;7 pipe by l a T connection tie cab ot the locomotive; their other ,ei being joined by a similar nl' S5. atthe tr' end oi the boiler, from which steain n pass -to the engine. The cab connection 3l is slioivn provided vv'th a throttle :valve 3G.

secti ns as a superheater, thus avoio making and instal a special superhcater; these selected sections may be located in suitable part of the boiler, as for 'instance soine of the set of sections l just in front of .the'furnace sections 13. As shown inv Figs.v

5, `Gand 7, vin 4which three pairs of sections l5 are converted into a superheater; they are secured, as are the other sections l5, to.,

the girder l0 by bolts and flanges 25 and 26.

rthey are also secured to the drum 19 by nip-l ples 21, 22 and 23; the nipples 2l and 22 loe-- ing closed in any suitable manner, as for instance by caps 38. 1These`superheater sec'- tions areV thus isolated from the other sec-1 tions of the boiler. i

The adjacent faces of the lower parts of the sections 37 may be connected Vtogether by nipples 39. The dry pipe 32, in this case, which mayv extend practically the whole length of the drum has its only outlets by the branches 49 connected to the nipples V23 at theupper partsof the superheatersections 37'.

. the outlets ofthe superheater sections are located most conveniently at their upper parts nipples Lllconnect them to boxes 1:2, and to insure 'proper circulation ofthe steam throughout them they are provided with f partitions 43, all. 'The partitions 43 have their upper ends in Contact with the tops of `Ell) the vsections and their lower ends a short distance from their bottoms, so` as to act as deflectors to direct lthe steam downwardly.

' The other partitions 441-, short both top and with the throttle valve and the valve is op of the locomotive and is there under the con-- bottoni, act as baffles to assist in distributingV the steam in the sections.

VThes'team passesl from the; superheaters tothe main supply pipe 45, which extends to the engine, from vthe boxes l2 by ,cross pipesfl connecting said boxes to a-throttle valve 47, formed with a baseto seat on the drum 19. The main steam pipe 4:5 connects erated by a rod 48, which extends to the Vcab trol of the engineer through the medium of any suitable voperating means, Vthe c-onstruc- -Y tion and functions of which will be well understood.V l

The safety blow-off is preferably applied to the superheating system, it may consist also be provided with cleaning vdoors suitably located at the top, sides and bottom.v The casing 50 is shown thevfull length ofthe locomotive frame, aiconsiderable dise plates 59, see Fig. 7.

ALSk

for

SQU-

Atance beyond the front of the boiler, leavinga space or room 53 at the front endof the locomotive ,seeV Fig. l, which illustrates a sectional boiler of this invention of a vlength to provide. as much or more steaming capacity than a regular type of locomotive v boiler that would occupy about all ofthe space longitudinally available on a locomotive. This room-or space 53'maybe util-V ized to hold the air pumps, sand boxes, tools,

ctc., and other appurtenances of theV locomotive. .Access to this room -niay be had Athrough the doorway 57.9 Y

The vertical offset of thetwo parts 9 Vand i0 of the sidegirders may be made-by adequately heavy and strong'angle or splicing v It will be understood that the steaming capacity of this boiler be increased to any desired extent bythe addition of sec'-V tions 15 to the forward end of the boiler, the drum 19, of course beingcorresponding ly lengthened, and still leaves suflici'ent room i in the space 53V for the purposesindicated. This room may also be -usedas the cabin cases where it isy deemed advisiable. or exof the locomotive.-

Lpedient to locate the engineer at the yfrf'rnt 'I High steam pressures, now generally de;-

sired, may becarried by the boiler ofthis inventionwithout calling for excessive orl `undue Weight as vresults lin attempting tol attain this endwith the present type of locomotive boilers. The comparative thin-hollow sections, whether made of' cast or wrought metal, may be strengthened to resist any` practical worlringpressures by braces, preferably consisting ofshort pieces -of tube passed through and expanded inthe sides of Vthe sections, asindicated at 58,'

Figuiv .I claim: l A

l. A locomotive boiler, comprising similar narrow hollow vertical sections, having supporting feet at theirflower-,edges transversely arranged edgewise in pairs with their adjacent edgesV atthe longitudinalv central plane of` the boiler and spaced Y apart to .provide l,continuous vertical heating passageA between them7 the boundaries ofthe trans-4v verse faces of each pair beingsubstantially equal to the vertical and transverse horizontal boundaries of the available'space 'of the locomotive above its running gear, said `duplexsections being in two Vsets longitudinally located in the boiler, the lower parts of the sides of Vthe set 'of'gections at thefurnace end of the boiler being water legs and constituting the side walls of thel fire box,

with their supportingfeet ata lower level than those of the other set of sections, inicom bination withthe main frame ofthe locomo ing feet of the sections are secured. I. 2. A. locomotive boiler, comprising narrow 'tive to theside girders of whichthesupportiso hollow sections, having arch formed bottoms and flange supporting feet at their lower outer edges, transversely arranged in the boiler and jspaced apart to provide heating passages between them, the boundaries of their continuons transverse faces being substantially equal to the vertical and transverse horizontal boundaries of the available space of the locomotive above its running gear, the main frame of the locomotive to which the supporting feet of the flanges of the sections are secured, and steam collecting means longitudinally centrally arranged and connected to the steamspaces of all of the sections.

3. A locomotive". boiler, comprising similark narrow hollow sections, having supporting feet at the ends of their lower edges, transversely arranged in theboiler and spaced apart to provide heating passages between them, the boundaries of their transverse continuous faces being substantially equal to the vertical and transverse horizontal boundaries of the available space of the locomotive above its ruiming gear, superheater composed of some of the sections, steam collecting means connected separately to the water spaces and-the steam spaces of f all of the sections other than the superheating sections and pipe connections joining said steam collecting means to the superheating sections only, in combination with the main frame of :the locomotive to which the supporting feet of the sections are secured.

4s. A locomotive boiler, comprising narrow hollow sections transversely arranged in the boiler and spaced apart to provide vertical heating passages between them, an equalizing chamber extending the full length of the boiler in communication with the. steam spaces of the sections, a furnacebeneath some of the sections at the rear end of the boiler, said furnace sections having water legs constituting the sides of the fire box, a combustion chamber extending from the furnace to the vfront end of the boiler beneath the other sections, at a higher level than the furnace grate, the main frame of the running gear of the locomotive to which the lower outer edges of all of the sections are secured and a passage with a chimney outlet at the top of the boiler into which all of the vertical heating passages open.

o. A locomotive boiler, comprising narrow hollow sections transversely arranged in the boiler and spaced apart to provide vertical lheating passages `between them, an equalizing chamber in communication with the steam spaces of the sections, a furnace beneath some of the sections at one end of the boiler, a. combustion chamber beneath the other sections and extending to the other end of the boiler, a passage at the-top of the lboiler open to all or the heating passages,

a bale plateor-wall athwart the combustion chamber. in continuation of one of the sections to cause the products of combustion to first pass through-the heating -spaces of the sections at the rear of said wall adjacent the furnace, a batlleplate or wall athwart the top passage, in advance of the lower baffle plate and resting on the top of another section, to direct said gases downwardly through another set of sections into the forward part of the combustion chamber and hence upwardly between the third set of sections into the forward-part of the top passage, which is provided with a chimney opening.

6. A locomotive boiler, comprising -narrow hollow sections, similarly* formed, transversely arrangerL in the boiler andrspaced apart to provide heating'passages between them, the boundaries-of their 'transverse continuous faces` being substantially equal to the vertical and transverse horizontal boundaries of the available space of kthe locomotive above its running gear, the length ot the boiler being less than that of the available space above the running gear, a furnace at the rear end, `a combustion chamber' extending forwardly from the furnace beneath the sections, a passage'at the top of the boiler open to all ofthe heating passa-ges, a chimney opening lat the front endof said passage 'extending upwardly therefrom and a casing surrounding the boiler.

7. A locomotive boiler, comprising` narrow hollow sections in three groups-transversely arranged in the lboiler and spaced apart to provide heating passages between them, a superheater composed of the middle group of sections, a drum longitudinally arranged, connecting passages between the water and steam spaces ofthe drum and sec- `tions other than the superheating. sections, a dry pipe in the drum and branch pipes from the dry pipe to the superheating sections.

8. A locomotive boiler, comprising` narrow hollow sections in 'three groups transversely arranged in therboiler and spa-ced apart to provide heating passages between them, a superheater composed of the middle group of? sections, a drum longitudinally arranged, connecting passages between the water and steam spaces of the drum and sectionsother than the superheating sections, a dry pipe inthe drum, branch pipes from the dry pipe to the superheating sections, a smoke passage over all of the sections into which all of the kheating passages open, a box connected to the super-heating sections, a throttle valve and a. pipe connection between the box and the throttle valve located in the smoke passage.

9. A, locomotive boiler, `comprising narrow hollow sections-transversely arranged in the boiler and spaced apart to provide .heating passages between them, a

llO

boiler, a smoke passage .over the sections into which all ot the heating passages open, a dry pipe in the drum, branch pipes from the dry pipe to the superheater sections and a horizontal safety valve connected to the -superheater and located in the smoke passave. Y

tl0. The combination with the running gear of a locomotive of a longitudinal girder secured to each side of the frame thereof of a boiler comprising narrow hollow sections transversely arranged and spa-ced apart to provide heating passages between them, a

drum longitudinally arranged and in communication with the water and steam spaces of the sections and means gt'or securing the outer lower edges of each section to the girders.

l1. The combination with the running gear. of a locomotive of ya vertically 'offset longitudinal girder secured to each sideot the frame thereof of a boiler comprising narrow hollow sections transversely arg ranged and spaced apart to provide heating spaces between them, a drum longitudinally arranged and in communication with the water and steam spaces of the drum and sections, means for securing the outer lower edges of each section to the grders, a furnace between the lower portions of the offset girders over whichV some of the sections are located, a combustion chamber extending forwardly from the furnace along the bottom of the boiler at the high portions of the ofset girders and over which the balance of the sections are located and-achimney provided passage at the top of the boiler` into which all of the passages between the' sections open.4 f i Signed at New York, county and State of New York, this 22nd day of September i JOHN J. GAIN.

In the presence of:-

J. C. LAWRENCE, JAMES A. HUDSON. 

